William Jay Jacobs Books

Truman

Average: 0.00, 0 Ratings

Presents a biography of the man who assumed the presidency following the sudden death of Franklin Delano Roosevelt in 1945.

Mussolini

By William Jay Jacobs

Average: 0.00, 0 Ratings

Hannibal, an African hero

By William Jay Jacobs

Average: 0.00, 0 Ratings

A biography of Hannibal whose military tactics baffled the Roman Empire's finest generals and whose campaigns are still studied with interest by military strategists.

Edgar Allan Poe: Genius in Torment

By William Jay Jacobs

Average: 0.00, 0 Ratings

A biography of the troubled nineteenth-century author with a discussion of his prose and poetry which greatly influenced prominent artists and writers throughout the world.

Ellis Island

By William Jay Jacobs

Average: 0.00, 0 Ratings

Prince Henry, the Navigator

By William Jay Jacobs

Average: 0.00, 0 Ratings

A biography of the Portuguese prince who made sailing safer by his navigational maps and who designed the caravel--a type of sailing ship.

Hernando Cortes

By William Jay Jacobs

Average: 0.00, 0 Ratings

A biography of Spanish adventurer, Cortes, who conquered Mexico in the early 1500's thus ending the Aztec nation.

Samuel de Champlain

By William Jay Jacobs

Average: 0.00, 0 Ratings

A biography of the French explorer who was the founder of Quebec and the "Father of New France."

Roger Williams

By William Jay Jacobs

Average: 0.00, 0 Ratings

A biography of the founder of Rhode Island, often called the "father of religious liberty in America."

How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.